The family that plays together, stays together -- and in the case of No Doubt's Gwen Stefani and Gavin Rossdale of Bush, that means occasionally popping up onstage for surprise duet renditions of your dearly beloved's greatest hits.

When you get to be as big as No Doubt, everything is a huge deal — rehearsing, recording, touring, even just doing press interviews — but few things are as mammoth of a production as a band like No Doubt making a video. Don’t believe us? Check out the behind-the-scenes we…